Span on ACI

[PatrickH1]

Hello Community,

i want to configure Tenant Span on ACI. One requirement for Tenant SPAN is a Layer 3 EPG where the Span Destination is located. But i can not find any Configuration or Best Pratice Guides to this Topic.

Does someone have experience with this and can share it?

A Configuration or Best Pratice Guides would also be helpful.

Best Regards

Patrick

[micgarc2]

If you are doing tenant SPAN this will be an ERSPAN. Yes, the destination needs to be an IP apart of an EPG with a L3 BD (unicast routing enabled). Basically we need a learned IP in the fabric to actually send the SPAN to.

Tenant SPAN uses an EPG itself as a source while Access SPAN just uses EPG just for a filter.

Config ex:

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Regards,

Michael G.

[PatrickH1]

Hello Micgarc2,

thanks for your helpful Feedback. Under Destination EPG, i have to configure "Source/IP Prefix", is the the Layer3 IP Adresses that is configured under the Layer3 BD acting as Anycast Gateway?

I will let you know when Tenant Span is successfully working :)

Kind Regards

Patrick

[micgarc2]

This can be any IP. Just need one to set the SRC IP in the IP header of the packet. If the prefix is used the node-id of the source node is used for the undefined bits. ex. prefix. 

10.0.0.0/8 on node-101 => src IP 10.0.0.101)

I like using prefix because in the SPAN it makes it nice to see the SPAN is being captured on Leaf101 for example.

[PatrickH1]

Good advice, i will do it the same way.